Production method for polar olefin polymer and copolymer

A nonpolar olefin-polar olefin copolymer that is a copolymer of a nonpolar olefin monomer and a polar olefin monomer represented by the following Formula (IV), the copolymer having a ratio of a polar olefin structural unit of not lower than 30% by mole with respect to all structural units:

• wherein, Z represents a heteroatom selected from the group consisting of nitrogen, oxygen, phosphorus, sulfur, and selenium;
• R1 represents a substituted or unsubstituted hydrocarbyl group having 1 to 30 carbon atoms;
• n represents an integer of 1 or 2 depending on the atomic species of Z;
• R3 represents a hydrocarbylene group having 1 to 5 carbon atoms;
• and
• R4 represents a halogen atom, a hydrocarbyl group having 1 to 10 carbon atoms, an alkylthio group having 1 to 10 carbon atoms, an alkylamino group having 1 to 10 carbon atoms, or an alkoxy group having 1 to 10 carbon atoms;
• when R4 is a hydrocarbyl group, R4 is optionally bound to form a fused ring;
• and m represents an integer of 0 to 4.